At the height of the financial crisis, two co-founders of Marvell Technology had to sell a big slug of stock in the semiconductor company following a margin call from Wall Street firm Goldman Sachs.

On Monday, the co-founders, Weili Dai and Sehat Sutardja, filed a lawsuit in California Superior Court alleging that the firm duped them into selling the shares so it could buy them for its own account.

“Goldman forced its clients to unnecessarily liquidate their holdings through forced margin calls, only to repurchase these same shareholdings for accounts owned by Goldman and its related hedge funds, some currently under investigation by the federal government,” according to the complaint.

A Goldman spokesman declined to comment, saying the firm had not yet seen the complaint.